Machine



(No Model.) 3 Sheets-Sheet i.

- H. H. TAYLOR SCREW TAPPING MACHINE.

No. 399,353. Patented Mar. 12, 1889.

(No Model.) 3 Sheets-Sheet 2.

H. H. TAYLOR.

SCREW TAPPING MACHINE.

No. 399,353. Patented Mar. 12, 1889.

e 6 1 152 J fl i: est.

N. PETERS. hmuulhogmpher. Waahingwm D C- 3 Sheets-Sheet 3. H. H. TAYLOR.

SCREW TAPPING MACHINE.

,353. Patented Mar. 12, 1889.

(No Model.)

N IAV .AVII I IN llll ll nwnlloi l. I... \Nl II I IQI w vll'l \w llwllll, b wloul (R Q M x U N H MN m. N J v- H 9--- -0 00 w H @N llllll a fl k fi a W i m 0 O I b U Q r UNITED STATES PATENT OEEIcE.

HARRISON H. TAYLOR, OF DETROIT, MICHIGAN, ASSIGN OR TO THE MICHIGAN RADIATOR AXD IRON MANUFACTURING COMPANY, OF SAME PLACE.

SCREW-TAPPING MACHINE.

PECIFICATION forming part of Letters Patent No. 399,353, dated March 12, 1889.

Application filed August 8, 1888. Serial No. 282,275. (No model.)

To all 11172 m zit may concern: 1 ing across the bed and suitably journaled Be it known that I, HARRISON H. TAYLOR,a thereupon. The shaft E provided toward citizen of the United States, residing at Deeach extremity with pinions e e, meshing, retroit, county of 'ayne, State of lllichigan, spect-ively, with gears F F, mounted upon 55 have invented a certain new and useful Imshafts 1:, said shafts being movable cndprovementin Sermv-Tapping Machines; and I wise to and from their adjacent ends. To efdeclare the followingto be a full, clear, and exfect this movement, each said shaft F, beact description of the same, such as will enal sides being suitably journaled upon the bed, ble others skilled in the art to which it aTpperas shown at f f f f has a screw-connection 6o 10 tains to make and use the same, reference beupon the bed, preferably at the respective ing had to the accompanyingdrawings, which outer ends, as shown at F F. It will thus be form a part; of this specification evident that as the shafts F F are rotated My invention has foritisobject an improved they will have an endwise movement to and screw-tapping machine more especially defrom each other, according to the movement 15 signed for sinniltancously screw-tapping the of the driving-shaft. For this reason the opposite hubs of a rztdiator-loop to receive a pinions e c on the shaft E are constructed threaded connecting-nipple. I do not, howof sutlicient breadth to mesh with the gears ever, con tine myself to such a use of the ma- F I", respectively, at any point of the movechinealonc,asIcontemplate,broadly,theproment of said gears. The shafts F F are 2o vision of a screw-tapping machine for various provided, respectively, with taps f" for purposes to which it may be found adapted. simultaneously tapping the two opposite hubs For the purpose of illustration and descripof the radiator-loop as the ,taps are advanced tion I will herewith refer to the machine as toward each other in the manner described. applied to tapping a radiator-loop. To properly hold the loop in position bc- 25 Accordingly Figure '1 is a front elevation of tween the taps, the shafts I F may each be the machine. Fig. 2 is an end elevation lookprovided with a tightening-head, as shown ing to the right of Fig. 1. Fig. 23 is an elevaat G G. The head G may have a screwtion of the opposite end. Fig. i is a plan threaded engagement in the adjacentboxing view. Fig. 5 is a detail view of the clutch. f f, as shown at. g, the said head being pro- 30 Fig. 6 is a sectional view of the same along vidcd with an operating-lever, G by which .1: .r, and Fig. 7 is a view showing details of the head may readily be suitably tightened the construction and arrangement of one of upon the loop when in place and loosened the tightening-lreads. therefrom when the loop is to be removed.

My invention consists of the combinations As shown in Fig. 7, I prefer to provide suit- 5 of devices and appliances, as more fully able packing, as at g, to prevent dirt from shown in the drawings, and more particularly running into the adjacent journal. The taps, pointed outhereinafterinthc following speciit will be seen, extend through the tightenfication and claims. ing-heads respectively.

In carrying out my invention, A represents An arm, A, may be engaged upon the bed 4.0 any suitable supporting bed or frame. to support the outer end of the radiator-loop B is a driving-shaft, preferably provided while the opposite end is being tapped. Said with a tight pulley, Z), intermediate the loose arm may be provided with any suitable depulleys t) 11 vice for holding the end of the loop firmly B and B are driving-belts running in op as, for instance, with an encircling-band, A

45 posite directions through guides C, adjustaand recessed plate A conforming to the bly engaged upon a clutch-bar, shape of the loop. As so constructed the ad- The driving-shaftis suitably journaled upon jacent end of the loop may be readilylocated the bed A, and preferably extends across the in position within the band and upon the rebed, and is provided toward its end opposite cesscd plate and removed therefrom. An ad- I00 50 the driving-pulleys with apinion, D, meshing ditional guide, 11, may be employed, if dewith a gear, E, upon a shaft, E ,-also eXtendsired.

The clutch-bar C is provided with an operating-lever, C and a retracting-spring, C the lever being piy otally engaged upon the bed, as shown at a.

To automatically retract the taps when they have done their work, any suitable mechanism may be employed, like the following, for instance:

I represents a latch to engage a corresponding recess, 0, in the clutch-bar, a spring I, effecting the engagement when the parts are properly related. To actuate the latch, I provide an adjustable pin or belt, 1 engaged with a sliding wedge-faced or angular block, I in a support, I, with which also the latch is engaged, as shown in Figs. 6 and 7. It will be observed that when the gear F advances, as shown in Fig. 4:, the gear Will press against said bolt 1 crowd forward the angular block I Fig. 5, whereby the latch will be gradually lifted from its engagement with the clutchbar. IVhen the latch is released, the spring C will instantly throw the clutch-bar in the corresponding position or into the position shown in Fig. at. By this movement of the clutch-bar the belt-guides C G thereto attached will be shifted correspondingly to throw the corresponding belt upon the tightpulley, and vice versa to rotate the drivingshaft. In this manner the taps are run into and out of the hubs of the radiator-loop. As the gear F recedes from the bolt 1 a spring, I will retract the block I into its normal position.

\Vhen the loop is in position to be tapped, the operator, seizing the lever 0 throws the clutch in the desired direction, engaging it with the latch I. The taps will then advance to their work and be automatically retracted, as above described. This manner of simultaneously reciprocating the shafts bearing the taps, so that both the hubs of a radiatorloop will be tapped at the same time, is simple, convenient, and expeditious.

\Vhat I claim is 1. I11 a screw-tapping machine, the combination, with a supporting-bed, of rotatable reciprocatory shafts or spindles, said spindles provided with taps and tightening-heads upon their adjacent ends, substantially as described.

2. In a screw-tapping machine, the combination, with a supportingbed, of rotatable and reciprocatory spindles provided with taps and tightening-heads, one of said heads made reciprocatory, substantially as described.

3. In a screw-tapping machine, the combination, with a supporting-bed, of rotatable reciprocatory spindles journaled thereupon and provided with taps and tightening-heads to embrace the work, one of said heads hav ing a screw-threaded engagement upon the bed, whereby it may be moved to and from the work, substantially as described.

4. In a screw-tapping machine, the combination, with rotatable reciprocatory tap-spindles, of a driving-shaft geared with said spindles, a clutch-rod, G a latch to engage one end of said clutch-bar, and a sliding block to raise said latch and release said clutch-bar, the said sliding block being operated by one of the gears upon the tap-spindles, substantially as set forth.

5. In a screw-tapping machine, the combination of the tap-spindles I F, having a screw-threaded engagement upon the supporting-bed of the machine, a shaft, E, geared with said spindles, and a driving-shaft geared with the shaft E, substantially as described.

6. In a screw-tapping machine, the combination,'with suitably-journaled taps, of tightening-heads for clamping the work between said taps, substantially as set forth.

7. In a screw-tapping machine, the combination, with suitably-journaled taps, of tightening-heads for holding the work in position, said taps working through said heads, substantially as set forth.

8. In a screw-tapping machine, the combination, with the tightening-heads having a screw-threaded engagement with their supports, of suitably journaled taps working through said heads, substantially as set forth.

9. In a screw-tapping machine, the combination, with rotatable reciprocatory tap-spindles, of a driving-shaft geared with said spindles, a clutch-rod, G a spring-actuated latch to engage one end of said clutch-rod, a sliding block to raise said latch and release it from said clutch-rod, and a pin or arm having an adjustable engagement with said sliding block, the said sliding block operated by a gear upon the tap-spindles, substantially as set forth.

In testimony whereof I sign this specification in the presence of two witnesses.

HARRISON II. TAYLOR.

Witnesses:

N. S. WRIGHT, CHAS. F. SALVER. 

